If you want a 3G iPhone without an AT&T contract, you can get one. Eventually. For $599 for the 8 GB version or $699 for the 16 GB version. That’s a 200 percent markup over the $199 price tag for the 8 GB version with a contract. AT&T isn’t providing details yet on when this hoped-for option will be offered (will it look like the SIM card plan?), or if the iPhone is unlocked, but a spokesman said all will be revealed before the July 11 launch.